Micro meter-gage



(No Model.) 2 Sheets-Sheet 1.

0. A. WALLG-REN. MIGROMETER GAGE.

No. 596.346. Patented Dec. 28,1897;

,4 TTOBNEYS m: Noam PETERS co. PHOYG-L1THOfl wasumm'oru. a. c.

(No Model.) v 2 Sheets-Sheet 2. O. A. WALLG'REN.

MIGROMETBR GAGE.

} No. 596,346. Patented Dec. 28,1897.

IN l/EN T01? A TTOHNEN.

a citizen of the United States, residing atv ilNrren STATES- PATENT Orrica CHARLES A. WALLGREN, OF BROOKLYN, NEXV YORK.

MlCROlVIETER-GAG E.

SPECIFICATION forming part of Letters Patent No. 596,346, dated December 28, 1897.

Application filed April 24, 1897. Serial No. 633,625. (No model.)

To all whom, it ntcty'concern:

Be it known thatI, CHARLES A. WALLGREN Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Micrometer-Gages, of which the following is a full and complete specification, such as will enable those skilled I in the art to which it appertains to make and use the same.

This invention relates to micrometer-gages for use in making fine measurements in the construction of various kinds of machinery ple in construction and operation and by means of which the most exact measurements and the finest subdivisions may be made.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which- Figure 1 is a side view of my improved gage with part of the construction broken away or shown in section; Fig. 2,,a view similar to Fig. 1, but on a larger scale, part of the construction being also in section, a part of one of the sliding jaws of the device being removed; and Fig. 3, a section on the line 3 3 of Fig. 2, showing the separate parts of said sliding jaw in position.

In the drawings forming part of this specification the separate parts of my improvement are designated by the same numerals of reference in each of the views, and in the practice of my invention I provide a gage of the class herein specified, the main parts of which consist of an oblong bar 5, which is rectangular in cross-section and provided at one end with an arm 6, which projects at right angles thereto, and a sliding main jaw 7, provided with an arm 8, and a sliding supplemental jaw 9, said jaws 7 and 9 being adapted to slide on the bar 5 and being each provided with means for clamping it in connection with said bar, and said supplemental jaw is also provided with devices for adjusting the position of the main and sliding jaw 7, which are constructed as hereinafter described.

The jaw 7 consists of a single piece, and the bar 5 passes through the head thereof, and mounted in the back of said jaw is a clamping-plate 10, which is provided with outwardly-directed end arms 11, and passing through the back of the head of said jaw, as shown at 12, is a set-screw 13, which is intended to press upon the clamping-plate 10 and forces the same firmly in contact with the bar 5, so as to lock the jaw 7 in any desired position, and formed centrally of the arm 8 of the jaw7 is a rectangular portion 14, in which is formed a longitudinal slot 15, which projects parallel with the outer side of the arm 8.

The jaw 9 is composed of two separate plates 16 and 17, and the bar 5 passes through the head thereof, and mounted in the back of said head is a set-screw 18, which presses upon a clamping-plate 19, and said set-screw and said clamping-plate are designed to securely clamp the jaw 9 to the bar 5 whenever desired, and said clamping-plate 19 is movable in the back of the head of the jaw 9, being held therein by a tongue-and-groove construction at each end thereof, as clearly shown in Fig. 1.

The head of the jaw 9 is provided with two arms 20, which project parallel with the arm 8 of the jaw 7, but which are shorter than said arm 8, and each of these arms is provided at its outer end with a tubularbearing 21, and the arms 20 and the bearings 21 are composed of separate parts formed integrally with the separate plates 16 and 17 ofthe jaw 9, and these separate parts of said jaw and said arms and said bearings are connected by bolts or screws 22, and set-screws 23 are employed at the outer sides of the tubular bearings 21 by means of which the separate parts of said tubular bearings are connected.

Mounted in each of the tubular bearings 21 is a tubular sleeve 24, each of which is provided at its end with an outwardly-directed annular flange or rim 25, and the sleeve 231i adjacent to the jaw 7 is also provided with a tubular extension or head 26, the perimeter of which is provided with a milled surface, as shown at 27 in Fig. 1, and formed on the outer end of the tubular bearings 21, which are carried by the outer arm 20 of the jaw 9, is a scale 28,which represents sixteenths of an inch, and the flange or rim 25 of the sleeve 24 adjacent thereto is provided with a scale 29, which represents tenths of an inch,an d formed on said sleeve adjacent to said flange or rim on which said scale 29 is formed is a tubular head 30, which is provided with a milled surface 31.

Mounted in the tubular bearings 21 is a tubular shaft 32, each end of which is provided with a circular head 33, and said shaft 32, between the circular heads thereof, is screw-thread ed, as shown at 34,the said thread being a double No. thread, which is equal to twenty threads to the inch, and mounted centrally of said shaft between the arms of the jaw 9 is a wheel 35, the perimeter of which is grooved or circular or segmental in cross-section, and said wheel is provided centrally with a circular opening which is screwthreaded in the same manner as the shaft 32, and the grooved perimeter thereof is also threaded, these threads being one hundred in number.

Passing centrally through the jaw 9 adjacent to the inn er end of the arms 20 is a screw 36, which operates in connection with the wheel 35, and the thread on this screw is what is known as a No. 20 thread, and said screw is provided with tenons or projections 37, which pass through circular plates 38, secured to the opposite sides of the jaws 9 by means of screws 39, and one of said tenons or projections 37 is provided with a milled head 40.

Mounted in the tubular shaft 32 is a shaft 41, which is screw-threaded at its outer end and provided with set nuts or burs 42, and the inner end of said shaft, or that end thereof in the direction of the arm 8 of the jaw 7, is provided with an enlarged circular head 43 and an enlarged extension 44, on which is formed a screw-threaded extension 45, which passes through the rectangular portion 14 of the arm 8 of the jaw 7, and mounted on said screw-threaded extension 45 of the shaft 41 within the slot or opening 15 is a nut 46, which projects to the opposite sides of the said portion 14 of the arm 8, and between the screwthreaded extension 45 on which the nut 46 is mounted and the enlarged portion 44 of the shaft 41 is a cross head or block 47, which is provided with a pin or projection 48, which is adapted to enter a corresponding socket or hole 49, formed in the rectangular portion 14 of the arm 8.

The tubular sleeve 24 on which the scale 29 is formed is provided in the inner wall thereof with a longitudinal groove 50, and the circular head at the adjacent end of the screw-threaded tubular shaft 32 is provided with a correspondingshoulder or projection 51, which is adapted to enter said groove, and said groove extends the full length of the sleeve 24 in which it is formed, and also through the tubular. head 30, which is formed thereon, and by means of this construction the screw-threaded tubular shaft 32 may be revolved by turning the sleeve 24 on which the tubular head and the scale 29 are formed. The jaw 7 or the arm 8 thereof is connected with the jaw 9 by means of the nut and the screw-threaded extension of the shaft 41, and the operation will be readily understood from the foregoing de* scription when taken in connection with the accompanying drawings and the following statement thereof.

It will be understood that in order to move either of the jaws 7 or 9 on the bar 5 said screws 13 and 18 must be loosened, and said jaws may be securely clamped to said bar in any desired position by means of said set screws.

The measurements to be taken are made by means of the arm 8 of the jaw 7, this arm being adjusted with reference to the arm (5, which is formed on or secured to the bar 5, and by means of the adjusting mechanism connected with the jaw 9 the arm 8 may be separated from the arm 6 to any desired extent, or the space between said arms may be adjusted with the greatest degree of exactitude.

In order to take any desired measurement, the jaw 7 is moved in the direction of the arm 6 until the arm 8 comes in contact with the said arm 6, and the sct-screw 13 is adjusted so that the jaw 7 will be free to slide 011 the bar 5, and in moving the jaw '7 in the direction of the arm 6 the jaw 9 must also be free to slide 011 the bar 5, and when the arm 8 is in contact with the arm 6 the jaw 9 is secured in place on the bar 5 by means of the setscrew 18.

It will be observed that the scale 28 on one of the tubular bearings 21 is provided with a zero-mark, as shown at 52, and the scale 29 on the rim or flange of the outer tubular sleeve 24 adjacent thereto is provided with a corresponding Zero-mark 53, and in order to separate the arm 8 from the arm 9 to the extent of one-hundredth part of an inch the tubular head 30 of the sleeve 24 with which it is connected is turned to the left until the next successive mark on the scale 29 reaches the zero-mark on the scale 28, and by turning said tubular head one complete revolution the arms 6 and 8 will be separated onetenth of an inch. By turning the tubular head 30 through one space of the scale 29 the jaw 8 will be moved one-hundredth part of an inch, as hereinbefore described, and by turning the screw 36 one complete revolution the wheel 35 will be turned, so as to operate the shaft 41 and move the arm 8 of the jaw 7 one-thousandth part of an inch, and it will be observed that by means of this combina tion of devices for adjusting the shaft 41 or for moving it longitudinally of its supports the position of the arm 8 with reference to the arm 6 may be adjusted to any desired degree of nicety.

The scale 28 is intended for use when it is desired to measure sixty-fourths of an inch, or multiples thereof, and in order to measure one sixt -fourth of an inch the sleeve on which the scale 29 is formed is turned through ICC two and one-half of the sixteen spaces on the scale 28.

My improved gage is simple in construction and operation and is perfectly adapted to accomplish the result for which it is intended.

Having fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A gage of the class herein described, said gage consisting of a bar which is provided at one end with an arm which projects at right angles thereto, a main sliding jaw mounted on said bar adjacent to said arm, a supplemental sliding jaw mounted on said bar, devices for securing each of said jaws to said bar, tubular bearings connected with said supplemental jaw, and parallel with said bar, tubular sleeves mounted in said bearings, a screw-threaded tubular shaft mounted in said sleeves, and a shaft mounted in said tubular shaft and adapted to be moved longitudinally thereby, one end of said shaft being detachably connected with said main jaw, substantially as shown and described.

2. A gage of the class herein described, said gage consisting of a bar which is provided at one end with an arm which projects at right angles thereto, a main sliding jaw mounted on said bar adjacent to said arm, a supplemental sliding jaw mounted on said bar, devices for securing each of said jaws to said bar, tubular bearings connected with said supplemental jaw, and parallel with said bar, tubular sleeves mounted in said bearings, a screw-threaded tubular shaft mounted in said sleeves, a shaft mounted in said tubular shaft and adapted to be moved longitudinally thereby, one end of said shaft being detachably connected with said main jaw, and means for moving said screw-threaded tubular shaft longitudinally, substantially as shown and described.

3. A gage of the class herein described, said gage consisting of a bar which is provided at one end with an arm which projects at right angles thereto, a main sliding jaw mounted on said bar adjacent to said arm, a supplemental sliding jaw mounted on said bar, devices for securing each of said jaws to said bar, tubular bearings connected with said supplemental jaw, and parallel with said bar, tubular sleeves mounted in said bearings, a screw-threaded tubular shaft mounted in said sleeves, a shaft mounted in said tubular shaft and adapted to be moved longitudinally thereby, one end of said shaft being detachably connected with said main jaw, and means for moving said screw-threaded tubular shaft longitudinally, consisting of a wheel mounted thereon and provided with a screw-threaded hub, and a groove in the perimeter which is screw-threaded, and a screw which passes through said jaw adjacent to the perimeter of said wheel, and which operates in connection therewith, substantially as shown and described.

at. A gage of the character herein described,

the same consisting of abar which is provided at one end with an arm which projects at right angles thereto, a main jaw longitudinally adj ust-able on said bar, and provided with an arm whichprojects parallel to the arm formed on said bar, a supplemental jaw longitudinally adjustable on said bar, a shaft supported by said supplemental jaw parallel with said bar, and the inner end of which is detachably connected with the arm on the main jaw, and means for moving said shaft longitudinally, consisting of a screw-threaded tubular shaft mounted thereon within said supplemental jaw, and means for moving the same longitudinally of its support, consisting of a wheel mounted thereon, and a sleeve through which one end of said tubular shaft passes, said sleeve being provided with a longitudinal groove in the inner wall thereof, and said tubular shaft being provided with a projection which moves therein, and said sleeve being revoluble, substantially as shown and described.

5. Agage of the oharacterherein described, the same consisting of a bar which is provided at one end with an arm which projects at right angles thereto, a main jaw longitudinally adjustable on said bar, and provided with an arm which projects parallel to the arm on said bar, a supplemental jaw longitudinally adjustable on said bar, a shaft supported by said supplemental jaw parallel with said bar, and the inner end of which is detachably connected with the arm on the main jaw, and means for moving said shaft longitudinally, consisting of a screw-threaded tubular shaftmounted thereon within said supplemental jaw and means for moving the same longitudinally of its support, consisting of a sleeve through which one end of said tubular shaft passes, said sleeve being provided with a longitudinal groove in the inner wall thereof, and said tubular shaft being provided with a projection which moves therein, and said sleeve being revoluble, and being provided with a scale, and a corresponding scale formed on the bearing in which said sleeve is mounted, substantially as shown and described.

6. A gage of the characterherein described, the-same consisting of a bar which is provided at one end with an arm which projects at right angles thereto, a main jaw longitudinally adjustable on said bar, and provided with an arm which projects parallel to the arm on said bar, a supplemental jaw longitudinally adjustable on said bar, a shaft supported by said supplemental jaw parallel with said bar, and the inner end of which is detachably connected with the arm on the main jaw, and means for moving said shaft longitudinally, consisting of a screw-threaded tubular shaft mounted thereon, and means for moving the same longitudinally of its support, consisting of a sleeve through which one end of said tubular shaft passes, said sleeve being provided with a longitudinal groove in the inner wall thereof, and said tubular shaft being provided with a projection which moves therein, and said sleeve being revolnble, and being provided with a scale, and a corresponding scale formed on the bearing in which said sleeve is mounted, and said screw-threaded tubular shaft being also provided centrally thereof with a wheel which is provided with a screw-threaded 1111b, and the perimeter of which is also screw-threaded, and a screw which passes through the supplemental jaw and operates in connection with said wheel, substantially as shown and described.

In testimony that I claim the foregoing as I 5 myinvention I have signed my name, in presence of the subscribing witnesses, this 22d day of April, 1897.

CHARLES A. WALLGRE-N.

Witnesses:

G. GERST, L. R. MAHONY. 

